Fixed Android instructions

README.md

@@ -109,7 +109,7 @@ linker = "/<absolute-path-to-home>/<path-to-sdk>/ndk/<ndk-version>/toolchains/ll
 linker = "/<absolute-path-to-home>/<path-to-sdk>/ndk/<ndk-version>/toolchains/llvm/prebuilt/linux-x86_64/bin/x86_64-linux-android<api-version>-clang"
 ```
 
-- You should also setup all the below environment variables in your terminal or in your `.bashrc`/`.zshrc` file (or in the system environment for Windows) to compile the Android app:
+- You should also setup all the below environment variables in your terminal or in your `.bashrc`/`.zshrc` file (or in the system environment for Windows) and install `gcc-multilib` with apt to compile the Android app:
 
 ```sh
 # These two variables depend on the architecture of the device 
@@ -208,4 +208,4 @@ jarsigner -keystore release.keystore ./path/to/apk alias_name
 
 <!-- WIP Github Action -->
 <!-- encrypt keystore locally with a password (ANDROID_KEYSTORE_PASSWORD): gpg -c --armor release.keystore => copy release-keystore.asc into ANDROID_KEYSTORE -->
-<!-- secrets: ANDROID_KEYSTORE, ANDROID_KEYSTORE_PASSWORD, ANDROID_KEYSTORE_ALIAS -->
+<!-- secrets: ANDROID_KEYSTORE, ANDROID_KEYSTORE_PASSWORD, ANDROID_KEYSTORE_ALIAS -->